Which of the following conditions is Gabapentin enacarbil used to treat?

Gabapentin enacarbil is specifically indicated for the treatment of restless leg syndrome (RLS). This condition is characterized by an uncontrollable urge to move the legs, typically in response to uncomfortable sensations. Gabapentin enacarbil works by acting on the central nervous system to help alleviate these symptoms, providing relief and improving sleep quality for those affected.

In contrast, the other conditions listed do not have Gabapentin enacarbil as a treatment option. Generalized anxiety disorder is treated with different classes of medications such as selective serotonin reuptake inhibitors (SSRIs) or benzodiazepines. Chronic migraines typically require preventatives like beta-blockers or anticonvulsants. Post-traumatic stress disorder (PTSD) is often managed with therapy and medications like SSRIs or specific anti-anxiety medications. Thus, the use of Gabapentin enacarbil is specifically tailored for RLS, highlighting its effectiveness in addressing the unique symptoms associated with this disorder.